The Effect of Chloride and Sulfate Ions on the Adsorption of Cd²⁺ on Clay and Sandy Loam Egyptian Soils

Table 3

Free energy of cadmium adsorption for the two examined soils under different conditions of salt matrix and concentration.

Salt	Concentration	Free energy Δ𝐺^∘ (KCal/mole)
		Alluvial soil	Calcareous soil
NaCl	0.05 N	−6.70	−7.14
	0.15 N	−6.62	−6.91
Na2SO4	0.05 N	−7.59	−8.00
	0.15 N	−7.44	−7.72